What happens if a bug bites you on your vein?

I get bad head rushes whenever I stand I eat normally and drink a lot of water so what can I do to prevent them? Can dogs catch a disease from eating squirrels? How can you encourage menstruation? What are the muscles used in a barbell upright row? When you are injured what imitates a chain reaction that forms a blood clot at the site? What type of soda makes your teeth turn brown the fastest? What is the definition of skin and what are the various types of skin? What happens when a will executor has alzheimer's disease? What is a submicroscopic thing? Can intercourse effect an ovarian cyst? Can a hot day cause a seizure through over heating? Can benign tumors break away from the original tumor and move to different parts of the body? Can you have anorexia and still want to eat? What is normal human body temperature in Fahrenheit? What is lady Macbeth trying to do while sleepwalking? What is the most dangerous type of alcohol to drink? When a pulse is a 100 with no activity is that dangerous? When will you start penile retraction? What is the medical term meaning tooth-shaped? How likely is it to experience hearing loss from alcohol abuse?